C1734
C1734 BCMDescription
The BCM (1) reads the air pressure signal received by the tire pressure receiver, and controls the low tire pressure warning lamp and the buzzer operations. It also has a judgment function to detect a system malfunction.
DTC Logic
C1734:
DTC CONFIRMATION PROCEDURE
1. DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
2. Perform BCM self-diagnosis with CONSULT-III "DATA MONITOR" within 15 minutes after stopped vehicle.
Is DTC "C1734" detected?
YES >> Proceed to diagnosis procedure. Refer to "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1. CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-III
1. On "SELECT DIAG" mode, select the "SELF-DIAG RESULT" screen.
2. Check display contents in self-diagnostic results.
Does self-diagnostic results indicate any malfunction?
YES >> Perform trouble diagnosis. Refer to WT-82, "DTC Index".
NO >> GO TO 2.
2. CHECK BCM POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect BCM harness connector.
3. Check voltage between BCM harness connector terminals and ground.
Is the power supply normal?
YES >> GO TO 3.
NO >> Check the following. If any items are damaged, repair or replace damage parts.
^ 40A fusible link [No. K located in the fuse block].
^ 10A fuse [No. 10 located in the fuse block (J/B)].
^ Harness for short or open between battery and BCM harness connector M118 terminal 1.
^ Harness for short or open between battery and BCM harness connector M119 terminal 11.
^ Check Battery voltage.
3. CHECK BCM GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to power in harness or connectors.
4. CHECK HARNESS BETWEEN BCM AND TIRE PRESSURE RECEIVER
1. Disconnect tire pressure receiver harness connector.
2. Check continuity between BCM harness connector and tire pressure receiver harness connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5. CHECK BCM
Check BCM input/output signal. Refer to WT-48, "Reference Value". Reference Value
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
6. CHECK BCM HARNESS CONNECTOR
Check BCM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> Replace BCM.
NO >> Repair or replace damaged parts.
Special Repair Requirement
1. CHECK TIRE AIR PRESSURE
Check all tire air pressures. Refer to WT-104, "Tire Air Pressure". [1][2]Specifications
Does all tire pressure data meet the specification?
YES >> GO TO 2.
NO >> Inspect or repair the tires or wheels and adjust the tire pressure to the specification.
2. PERFORM ID REGISTRATION
Perform ID registration. Refer to WT-6, "ID REGISTRATION PROCEDURE: Special Repair Requirement". Transmitter ID Registration Procedure
>> END